Method and device for detecting magnetic security thread of banknote

A security thread and magnetic technology, which is applied in the detection method and device field of banknote magnetic security thread, can solve the problems of insufficient and simple calculation, existence of false rejection rate, time-consuming and other problems, achieve stable recognition and positioning effect, small error, short time effect

Active Publication Date: 2017-03-15
SHENZHEN YIHUA COMP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above method takes a lot of time because the binarization of the magnetic line area is equivalent to traversing the image once.
Recognition features Identify the magnetic line features in the located feature area, the calculation is not enough and simple, and at the same time, various thresholds related to the gray value are inevitably used in the features, so there are pixel value errors caused by the unstandardized external conditions of the sensor such as temperature In the case of , there is a rejection rate

Method used

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  • Method and device for detecting magnetic security thread of banknote
  • Method and device for detecting magnetic security thread of banknote

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Experimental program
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Embodiment 1

[0021] Please refer to the attached figure 1 , is a schematic flow chart of a method for detecting a banknote magnetic security thread provided in Embodiment 1 of the present invention. The method is applicable to the scene of locating the banknote magnetic security thread. The method is performed by a banknote magnetic security thread detection device, which can Realized by software and / or hardware, and integrated inside the terminal. The method specifically includes the following steps:

[0022] S110. Acquiring an infrared transmission image of the banknote.

[0023] It should be noted that the reason why the detection method uses the infrared transmission image for identification is to use the characteristic that the magnetic security thread is black under the infrared transmission light, and it is not affected by the orientation or inclination of the banknote, which can ensure the stability of the identification and positioning effect.

[0024] Optionally, before acquiri...

Embodiment 2

[0047] Please refer to the attached figure 2 , which is a structural schematic diagram of a banknote magnetic security thread detection device provided in Embodiment 2 of the present invention, the device specifically includes the following modules:

[0048] The image acquisition module 210 is configured to acquire the infrared transmission image of the banknote.

[0049] The feature extraction module 220 is configured to extract feature information of the magnetic security line area in the infrared transmission image, the feature information including row feature values ​​and column feature values ​​of the magnetic security line area.

[0050] The security thread coordinate determination module 230 is configured to determine the coordinates of the magnetic security thread according to the statistical values ​​of the row feature value and the column feature value and the threshold value of the magnetic security thread of the banknote.

[0051] Preferably, the device further ...

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Abstract

The invention discloses a method and a device for detecting a magnetic security thread of a banknote. The method comprises the steps of: acquiring an infrared transmission image of the banknote; extracting characteristic information of a magnetic security thread region in the infrared transmission image, wherein the characteristic information includes a row characteristic value and a column characteristic value of the magnetic security thread region; and determining coordinates of the magnetic security thread according to a statistical value of the row characteristic value and the column characteristic value as well as a threshold value of the magnetic security thread of the banknote. The method and the device have the advantages of being capable of ensuring that the identification and positioning effect is stable, having small error and being short in time consumption.

Description

technical field [0001] The embodiments of the present invention relate to the field of banknote processing, in particular to a method and device for detecting magnetic security threads of banknotes. Background technique [0002] At present, in the circulation process of banknotes, the security line plays the most important role in both positioning features and anti-counterfeiting. Even in the 2015 version of RMB 100, a security line was added to further improve the anti-counterfeiting performance of RMB. It can be said that the positioning and detection of the security line is the first and most important step in the identification of counterfeit RMB. [0003] In the prior art, the magnetic line positioning method of banknotes is mainly to denoise the magnetic image and binarize the gradient image, and horizontally project the binarized gradient image to obtain the preliminary positioning of the magnetic security thread image. The magnetic image of the safety thread extract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07D7/20
CPCG07D7/20
Inventor 傅博扬
Owner SHENZHEN YIHUA COMP
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